Damage at Japan Nuclear Plant May Be Worse Than Thought.

TOKYO -- The damage to one of three stricken reactors at the Fukushima Daiichi plant could be worse than previously thought, a recent internal investigation has shown, raising new concerns over the plant's stability and complicating the post-disaster cleanup. The government has said that the plant's three badly damaged reactors have been in a relatively stable state, called a cold shutdown, for months, and officials say that continues. But new tests suggest that the plant -- which was ravaged last March when a powerful earthquake and tsunami hit the area -- might not be as stable as the government or the operator of the plant, Tokyo Electric Power Company, or Tepco, had hoped. [ABSTRACT FROM AUTHOR]